Saturated absorption spectrum of cesium micrometric-thin cell with suppressed crossover spectral lines

doi:10.1088/1674-1056/acc802

中国物理B ›› 2023, Vol. 32 ›› Issue (7): 73201-073201.doi: 10.1088/1674-1056/acc802

Saturated absorption spectrum of cesium micrometric-thin cell with suppressed crossover spectral lines

Junlong Han(韩俊龙)¹, Bowen Wang(王博闻)¹, Junhe Zheng(郑俊鹤)¹, Shuyuan Chen(陈书源)¹, Wei Xiao(肖伟)¹, Teng Wu(吴腾)^1,2, Hong Guo(郭弘)^1,2, and Xiang Peng(彭翔)^1,2,†

1 School of Electronics, Peking University, Beijing 100871, China;
2 Center for Quantum Information Technology, Peking University, Beijing 100871, China

收稿日期:2023-01-20 修回日期:2023-03-21 接受日期:2023-03-28 出版日期:2023-06-15 发布日期:2023-06-29
通讯作者: Xiang Peng E-mail:xiangpeng@pku.edu.cn
基金资助:
Project supported by the National Natural Science Foundation of China (Grant Nos. 61571018 and 61531003).

Saturated absorption spectrum of cesium micrometric-thin cell with suppressed crossover spectral lines

Junlong Han(韩俊龙)¹, Bowen Wang(王博闻)¹, Junhe Zheng(郑俊鹤)¹, Shuyuan Chen(陈书源)¹, Wei Xiao(肖伟)¹, Teng Wu(吴腾)^1,2, Hong Guo(郭弘)^1,2, and Xiang Peng(彭翔)^1,2,†

1 School of Electronics, Peking University, Beijing 100871, China;
2 Center for Quantum Information Technology, Peking University, Beijing 100871, China

Received:2023-01-20 Revised:2023-03-21 Accepted:2023-03-28 Online:2023-06-15 Published:2023-06-29
Contact: Xiang Peng E-mail:xiangpeng@pku.edu.cn
Supported by:
Project supported by the National Natural Science Foundation of China (Grant Nos. 61571018 and 61531003).

摘要/Abstract

摘要： Micrometric-thin cells (MCs) with alkali vapor atoms have been valuable for research and applications of hyperfine Zeeman splitting and atomic magnetometers under strong magnetic fields. We theoretically and experimentally study the saturated absorption spectra using a 100-μ cesium MC, where the pump and probe beams are linearly polarized with mutually perpendicular polarizations, and the magnetic field is along the pump beam. Because of the distinctive thin chamber of the MC, crossover spectral lines in saturated absorption spectra are largely suppressed leading to clear splittings of hyperfine Zeeman transitions in experiments, and the effect of spatial magnetic field gradient is expected to be reduced. A calculation method is proposed to achieve good agreements between theoretical calculations and experimental results. This method successfully explains the suppression of crossover lines in MCs, as well as the effects of magnetic field direction, propagation and polarization directions of the pump/probe beam on saturated absorption spectrum. The saturated absorption spectrum with suppressed crossover lines is used for laser frequency stabilization, which may provide the potential value of MCs for high spatial resolution strong-field magnetometry with high sensitivity.

关键词: micrometric-thin cells, saturated absorption spectrum, hyperfine Zeeman splitting, crossover spectral lines, laser frequency stabilization

Abstract: Micrometric-thin cells (MCs) with alkali vapor atoms have been valuable for research and applications of hyperfine Zeeman splitting and atomic magnetometers under strong magnetic fields. We theoretically and experimentally study the saturated absorption spectra using a 100-μ cesium MC, where the pump and probe beams are linearly polarized with mutually perpendicular polarizations, and the magnetic field is along the pump beam. Because of the distinctive thin chamber of the MC, crossover spectral lines in saturated absorption spectra are largely suppressed leading to clear splittings of hyperfine Zeeman transitions in experiments, and the effect of spatial magnetic field gradient is expected to be reduced. A calculation method is proposed to achieve good agreements between theoretical calculations and experimental results. This method successfully explains the suppression of crossover lines in MCs, as well as the effects of magnetic field direction, propagation and polarization directions of the pump/probe beam on saturated absorption spectrum. The saturated absorption spectrum with suppressed crossover lines is used for laser frequency stabilization, which may provide the potential value of MCs for high spatial resolution strong-field magnetometry with high sensitivity.

Key words: micrometric-thin cells, saturated absorption spectrum, hyperfine Zeeman splitting, crossover spectral lines, laser frequency stabilization

中图分类号: (Fine and hyperfine structure)

32.10.Fn

32.30.-r (Atomic spectra?) 32.60.+i (Zeeman and Stark effects)

Junlong Han(韩俊龙), Bowen Wang(王博闻), Junhe Zheng(郑俊鹤), Shuyuan Chen(陈书源),Wei Xiao(肖伟), Teng Wu(吴腾), Hong Guo(郭弘), and Xiang Peng(彭翔). Saturated absorption spectrum of cesium micrometric-thin cell with suppressed crossover spectral lines[J]. 中国物理B, 2023, 32(7): 73201-073201.

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Saturated absorption spectrum of cesium micrometric-thin cell with suppressed crossover spectral lines

Saturated absorption spectrum of cesium micrometric-thin cell with suppressed crossover spectral lines

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